Motherboard – ATX (up to 12” x 11”), Micro-ATX Drive bay External – 5.25” x 2 Internal – 3.5″ x 3 , 2.5” x 2 Cooling system Front – 2 x 120mm/140mm fan slot (1 x 120mm intake fan included) Rear – 1 x 120mm fan slot Top – 2 x 120mm fan slot (SST-PS11B-W)